Cord lock for a venetian blind or a shade

Details Cord lock for a venetian blind or a shade Cord lock for a venetian blind or a shade

1989-02-23

1991-01-08

Purol, David M.

Flexible or portable closure, partition, or panel

Plural strip, slat, or panel type

Venetian blind type

24134R, E06B 9324

Patent

active

049827766

ABSTRACT:
A cord lock for a venetian blind or shade, such as a pleated shade, having a housing with a stationary pulley and a serrated cam or rivet guided in parallel, aligned S-shaped slots, the cam locking the raised lift cord of the blind or shade against the pulley. The S-shape of the slot maximizes the angle of approach of the slot with respect to the cord and pulley to thereby increase the sensitivity of the lock.

REFERENCES:
patent: 2357911 (1944-09-01), Schaefer
patent: 4180118 (1979-12-01), Vecchiarelli
patent: 4245688 (1981-01-01), Vecchiarelli
patent: 4250597 (1981-02-01), Ford et al.
patent: 4327797 (1982-05-01), Nakajima et al.
patent: 4352386 (1982-10-01), Butler et al.
patent: 4476909 (1984-10-01), Anderle et al.
patent: 4637445 (1987-01-01), Nilsson
patent: 4722383 (1988-02-01), Kross
patent: 4727921 (1988-03-01), Vecchiarelli

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